Use this list judiciously, always furthering your own investigation, as a company may have become a mainstream publisher complete with editorial staff or may not be primarily in the self-publishing business. Also, while there are many bestsellers, including some all-time bestsellers, such as Fifty Shades of Grey and The Joy of Cooking, that are or initially were self-published, editors should exercise caution when using books from self-published firms and should always follow the specific exception criteria described at WP:SPS or WP:ABOUTSELF; see also WP:USESPS.

This list is not a complete list of companies currently engaged in the self-publishing business. If you know of a self-publishing company that is not on the list, please add it. Conversely, if you know that a company on this list is not primarily a self-publishing company, please remove it. Publishers do not have to be notable to be listed here; those that are notable should also be included in the article List of self-publishing companies.